Q1. A 9.0 cm diameter wire coil is at first oriented so that its plane is perpendicular to a magnetic field of 0.67 T pointing up. During the course of 0.30 s, the field is changed to one of 0.25 T pointing down. What is the average induced emf in coil?
Q2. How do you find the current whilst you have the loop with two power supplies and three resistors in parallel?
Q3. An attack helicopter is equipped with a 23- mm cannon that fires 58 g shells in the forward direction with a muzzle speed of 1130 m/s. The fully loaded helicopter has a mass of 3490 kg. A burst of 245 shells is fired in a 5.87 s interval.
What is the resulting average force on that helicopter?